Update the commit_over_52 template tag to be more efficient.
Update the commit_over_52 template tag to be more efficient.

Replaced several list comprehensions with in-database operations and map calls for significantly improved performance.

nanuxbe/djangopackages,cartwheelweb/packaginator,benracine/opencomparison,audreyr/opencomparison,pydanny/djangopackages,pydanny/djangopackages,QLGu/djangopackages,cartwheelweb/packaginator,miketheman/opencomparison,pydanny/djangopackages,nanuxbe/djangopackages,QLGu/djangopackages,audreyr/opencomparison,benracine/opencomparison,miketheman/opencomparison,nanuxbe/djangopackages,QLGu/djangopackages,cartwheelweb/packaginator